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Project Grasshoppers FZR 3LN3

Discussion in 'Your 250cc Projects' started by GreyImport, Feb 16, 2014.

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  1. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    If you are going to play with mixture screws/pilot jets/air jets there is a good guide here.
    http://vma.cape.com/~patrick/brm/carbkei.htm
    It is for FCRs but for this topic it is relevant. Pay attention to the Slow fuel jet and Slow air jet sections.
    But I know that you have already read all this because you went through my links page and said "Hey this is some good stuff. I think I'll read it all" :)
     
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    maelstrom, Jan 23, 2015
    #161
  2. Revolver

    Revolver Big Member Premium Member

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    Only thing I can see is a missing engine mount bolt....
     
    Revolver, Jan 24, 2015
    #162
  3. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    The sparkly bits are liquid. Smelled like fuel
     
    Linkin, Jan 24, 2015
    #163
  4. Joker

    Joker See "about me" for contact details. Contributing Member

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    Sure you don't have a faulty fuel tap that's dripping fuel and contaminating your oil...?
     
    Joker, Jan 24, 2015
    #164
  5. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Mate the fuel tap is definitely faulty/leaking. Hopefully it's not diluting the oil too much
     
    Linkin, Jan 24, 2015
    #165
  6. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    How does a seeping fuel tap contaminate the oil? :idk:
     
    GreyImport, Jan 24, 2015
    #166
  7. Joker

    Joker See "about me" for contact details. Contributing Member

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    if the fuel supply is consistent to one of the carburetor bowls AND you've got a sticky float (possibly a hardened o ring or something on the float assembly) then fuel could seep into the engine and make its way into the oil sump. A bit of a gravity feed so to speak.

    Left field thought, but easy to check and fix.
     
    Joker, Jan 24, 2015
    #167
  8. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    If your talking about when the bike is off then nothing will get past the fuel pump .....?
     
    GreyImport, Jan 24, 2015
    #168
  9. Joker

    Joker See "about me" for contact details. Contributing Member

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    Depends on the bike I guess? I'm probably thinking bandit which has a vacuum petcock.

    Maybe just the float o ring scenario then?
     
    Joker, Jan 24, 2015
    #169
  10. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Well on the FZRs Ive dealt with it can take ages for the fuel pump to just prime when starting after sitting for awhile
     
    GreyImport, Jan 24, 2015
    #170
  11. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Linkin, Jan 24, 2015
    #171
  12. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Linkin, Jan 24, 2015
    #172
  13. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Another thing I noticed today, the steering is not quite straight. When the wheel is straight the bars are slightly to the left
     
    Linkin, Jan 27, 2015
    #173
  14. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    GreyImport, Jan 27, 2015
    #174
  15. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    I thought that was fixed with unbolting and re-tightening?
     
    Linkin, Jan 27, 2015
    #175
  16. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Eugh. This bike does not like cold/wet weather! Won't hold an idle, floods all the time, you can hold the throttle steady and the revs go up and down on their own. It's all wonky :(

    I guess I'll just have to ride fast everywhere :D
     
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    Linkin, Jan 28, 2015
    #176
  17. Moo

    Moo Plodge Racing!!!

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    haha welcome to the world of fizzers :p a can of start ya bastard in your back pocket and you'll be right!
     
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    Moo, Jan 29, 2015
    #177
  18. Willrcr15

    Willrcr15 Well-Known Member

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    See if you can get a set of stock carbies & rebuild them, set the floats & have them ready to bolt on & all your problems will be over.
    Are you running a stock airbox & filter? cause if your not you'll never get it going properly.
     
    Willrcr15, Jan 29, 2015
    #178
  19. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Grey has a set of spare carbies, course him and Grasshopper are overseas for a while yet... nothing I can really do from here with the bike.

    However it's warmed up today and ran fine
     
    Linkin, Jan 29, 2015
    #179
  20. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Yes it is ....... and if anyone touches it but me ..... I will kill them
     
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    GreyImport, Jan 29, 2015
    #180
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